high altitude?
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Freshman User
Joined: May 2006
Posts: 43
Likes: 0
From: southern colorado
high altitude?
first, quick update:
I reported that I developed a stumble on take-off. Found ATF in modulator line, bought 14 dollar modulator at Azone. This cured the stumble. What with a gentle flush, new mod, plus new 02 sensor (after 140,000) my 93 4.0 runs and shifts like new.
When buying the mod, the guy first said I didnt have one.
But he looked some more, mumbled something about high altitude version, and found me one.
So thats my question. I bought my 93 4.0 awd used...is there such a thing as a high altitude version and how would I determine this.
Not so coldgeorge...ah, summertime!
I reported that I developed a stumble on take-off. Found ATF in modulator line, bought 14 dollar modulator at Azone. This cured the stumble. What with a gentle flush, new mod, plus new 02 sensor (after 140,000) my 93 4.0 runs and shifts like new.
When buying the mod, the guy first said I didnt have one.
But he looked some more, mumbled something about high altitude version, and found me one.
So thats my question. I bought my 93 4.0 awd used...is there such a thing as a high altitude version and how would I determine this.
Not so coldgeorge...ah, summertime!
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
there was a high altitude vac. mod. from factory for rigs shipped per high altitude order but most replace with standard which works fine up to 10k ft...
if you are experiencing no shift problems such as slippage or hard shifts I would use the standard...call your local area Ford dealer shop parts counter and see what they put in....Ford M/C vac. mod. prices will shock you....last designed use 12 years ago
E5TZ-7A377C is the stock A4LD vac. mod/w brown stripe...compare p# to your old
only one vac. mod cared by MC now for 4L....single diaphram fixed brown stripe which is the standard
best way to resolve if you are having shift problems caused by your local elevation and not by tranny failure is to install an adjustable vac. mod.
http://www.bulkpart.com/Merchant2/me...=A4LDmodulator
gives you that personalized shift feel.
always go for the oldest guy behind the parts counter for these Aero parts...the geezer setting behind a desk in the back or off to the side drinking coffee or talking engines...probably one of the owners...
the young aggressive kids jump on customers for the commishes
if you are experiencing no shift problems such as slippage or hard shifts I would use the standard...call your local area Ford dealer shop parts counter and see what they put in....Ford M/C vac. mod. prices will shock you....last designed use 12 years ago
E5TZ-7A377C is the stock A4LD vac. mod/w brown stripe...compare p# to your old
only one vac. mod cared by MC now for 4L....single diaphram fixed brown stripe which is the standard
best way to resolve if you are having shift problems caused by your local elevation and not by tranny failure is to install an adjustable vac. mod.
http://www.bulkpart.com/Merchant2/me...=A4LDmodulator
gives you that personalized shift feel.
always go for the oldest guy behind the parts counter for these Aero parts...the geezer setting behind a desk in the back or off to the side drinking coffee or talking engines...probably one of the owners...
the young aggressive kids jump on customers for the commishes
Postmaster
Joined: Apr 2001
Posts: 3,818
Likes: 3
You might be worrying needlessly. I've driven Trail Ridge Road (>11,000 ft) in Estes Park, Colorado many times with a stock modulator without any shifting problems. Usually fully loaded with visiting family touristas as well.
